Medición de la resistencia al corte del hormigón simple utilizando el modelo de viga a flexión y su comparación con la fórmula propuesta en el ACI 318-19

Abstract

In the present investigation was realized a comparative analysis of the concrete beams subjected to experimental shear when there is longitudinal reinforcement, but there is not transverse reinforcement; and the derivative of the formula proposed in ACI 318-19 [1], as indicated in Equation 1. Actually there is no standard that regulates the test to quantify the shear strength of concrete, for this reason, from the Standard Test Method for Flexural Strength of Concrete (ASTM C78), the beam was forced to fail per shear. 36 concrete beams were evaluated, whose design of the mixture was carried out with the ASOCRETO method, in which a fixed ratio a/d was used, where “a” is the distance among application load and the support and “d” is the effective depth; the reinforcement ratio (ρ) was varied between the minimum, the maximum and the average between them, and the compressive strength of the concrete (f'c) was varied from 21, 24 and 28 MPa. The shear resistance values obtained from the test realized were compared with the values obtained through the proposal formula in ACI 318-19.